EP 0330505 A1 19890830 - Process for preparing polyimides.
Title (en)
Process for preparing polyimides.
Title (de)
Verfahren zur Herstellung von Polyimiden.
Title (fr)
Procédé de préparation de polyimides.
Publication
Application
Priority
- JP 4070688 A 19880225
- JP 4461988 A 19880229
- JP 4578088 A 19880301
- JP 4578188 A 19880301
- JP 31508688 A 19881215
- JP 31508788 A 19881215
- JP 31508888 A 19881215
- JP 31612288 A 19881216
Abstract (en)
A process for preparing a polyimide by reaction of a diamine and a tetracarboxylic dianhydride to obtain a polyamide acid and subjecting the polyamide acid to conversion into a polyimide thermally or chemically. The reaction in the process is carried out in the presence of at least one dicarboxylic anhydride selected from the group consisting of aliphatic dicarboxylic anhydrides and aromatic dicarboxylic anhydrides, and the amount of the tetracarboxylic dianhydride is in the range of from 0.9 to 1.0 mole per mole of the diamine and the amount of the dicarboxylic anhydride is in the range of from 0.001 to 1.0 mole per mole of the diamine. The resultant polyimides exhibit good thermal stability at high temperatures and good forming processability even at low temperatures.
IPC 1-7
IPC 8 full level
C08G 73/10 (2006.01); C08G 73/14 (2006.01)
CPC (source: EP KR US)
C08G 73/10 (2013.01 - KR); C08G 73/1014 (2013.01 - EP US); C08G 73/14 (2013.01 - EP US)
Citation (search report)
[A] DE 1520519 A1 19691127 - DU PONT
Designated contracting state (EPC)
CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0330505 A1 19890830; AU 3073489 A 19891123; AU 604402 B2 19901213; KR 890013087 A 19890921; KR 920006366 B1 19920803; US 4937316 A 19900626
DOCDB simple family (application)
EP 89301875 A 19890224; AU 3073489 A 19890224; KR 890002190 A 19890224; US 31373289 A 19890222